def Secant(building):
array = arcpy.Array([arcpy.Point(*coords) for coords in building])
build = arcpy.Geometry("POLYGON", array)
secants = []
k=2
for pnt in building[2:-2]:
d = Distance(building[0][0],pnt[0],building[0][1],pnt[1])
num = k+1
geom = arcpy.Geometry("POLYLINE", arcpy.Array([arcpy.Point(building[0][0],building[0][1]), arcpy.Point(pnt[0],pnt[1])]))
if geom.within(build): in_out = 1
else: in_out = 0
diction = {'id':(str(0)+str(k)), 'lenght':d, 'vert_num':num, 'id_from':0, 'id_to':k, "in_out":in_out}
if not geom.crosses(build):
secants.append(diction)
k+=1
i=1
for pnt in building[1:]:
j=i+2
for oth in building[i+2:-1]:
d = Distance(pnt[0],oth[0],pnt[1],oth[1])
num = j-i+1
geom = arcpy.Geometry("POLYLINE", arcpy.Array([arcpy.Point(pnt[0],pnt[1]), arcpy.Point(oth[0],oth[1])]))
if geom.within(build): in_out = 1
else: in_out = 0
diction = {'id':str(i)+str(j), 'lenght':d, 'vert_num':num, 'id_from':i, 'id_to':j, "in_out":in_out}
if not geom.crosses(build):
secants.append(diction)
j+=1
i+=1
secants = sorted(secants, key=lambda k: k['lenght'])
return secants
def external_edge_buffer(in_edges, edge_buffer, out_fc=None):
g_edges = arcpy.Buffer_analysis(in_edges, arcpy.Geometry(), 0.1, "FULL", "ROUND", "ALL")
g_edge_to_polys = arcpy.FeatureToPolygon_management(g_edges, arcpy.Geometry())
g_buffer_polys = arcpy.Buffer_analysis(g_edge_to_polys, arcpy.Geometry(), edge_buffer, "FULL", "ROUND", "ALL")
if out_fc:
arcpy.CopyFeatures_management(g_buffer_polys, out_fc,)
return g_buffer_polys
def thing(fc_stream, fc_contour):
g_wtc = arcpy.CopyFeatures_management(fc_stream, arcpy.Geometry())
g_ctr = arcpy.CopyFeatures_management(fc_contour, arcpy.Geometry())
for g in g_ctr:
print g.firstPoint, g.lastPoint
for v in g_wtc[0]:
print v.X, v.Y, v.Z
def execute(self, parameters, messages):
"""The source code of the tool."""
in_layer = parameters[0].valueAsText
erase_layer = parameters[1].valueAsText
output_layer = parameters[2].valueAsText
in_geometries = arcpy.CopyFeatures_management(in_layer,
arcpy.Geometry())
dissolve_erase_geometry = arcpy.Dissolve_management(
erase_layer, arcpy.Geometry())[0]
erase_result_geometry = [
polygon.difference(dissolve_erase_geometry)
for polygon in in_geometries
]
return arcpy.SpatialJoin_analysis(erase_result_geometry, in_layer,
output_layer)
def execute(self, parameters, messages):
"""The source code of the tool."""
in_layer = parameters[0].valueAsText
out_layer = parameters[1].valueAsText
method = parameters[2].valueAsText
in_geometries = arcpy.CopyFeatures_management(in_layer,
arcpy.Geometry())
if method == 'ALL':
in_geometries = arcpy.Dissolve_management(in_geometries,
arcpy.Geometry())
result_geometry = [
line.convexHull() for line in in_geometries
if line.convexHull().type == 'polygon'
]
return arcpy.CopyFeatures_management(result_geometry, out_layer)
def parseCORRIDOR(record,height):
utils.common.OutputMessage(logging.DEBUG, "{0} parseCORRIDOR()".format(time.ctime()))
line = []
items = record.split('/')
(distance, units) = parseDistance(items[1])
for i in items:
if i.startswith('LATS') == True or i.startswith('LATM') == True or i.startswith('DMPIT') == True:
line.append(parseLatLong(i,height))
pass
newline = arcpy.Polyline(arcpy.Array([arcpy.Point(*coords) for coords in line]),arcpy.SpatialReference(4326), False, False)
arcpy.Buffer_analysis(arcpy.Polyline(arcpy.Array([arcpy.Point(*coords) for coords in line]),arcpy.SpatialReference(4326), False, False), r'in_memory\tempBuffer', '%s %s' % (distance/2, units), 'FULL', 'FLAT', 'ALL')
geometries = arcpy.CopyFeatures_management(r'in_memory\tempBuffer', arcpy.Geometry())
objJson = json.loads(geometries[0].JSON)
objJson['hasZ'] = True
for i in range(0, len(objJson['rings'])):
for j in range(0, len(objJson['rings'][i])):
objJson['rings'][i][j].append(height)
arcpy.Delete_management(r'in_memory\tempBuffer')
del geometries
return objJson
def get_unique_point(line_layer, start_of_drainages="p_o_start"):
global start_of_drainages_fullpath
arcpy.CreateFeatureclass_management(workspace, start_of_drainages,
"Multipoint", "", "DISABLED",
"DISABLED", line_layer)
geometries = arcpy.CopyFeatures_management(line_layer, arcpy.Geometry())
#arcpy.AddMessage("-"*22)
startlist = []
lastlist = []
for geometry in geometries:
startlist.append(
[round(geometry.firstPoint.X, 2),
round(geometry.firstPoint.Y, 2)])
lastlist.append(
[round(geometry.lastPoint.X, 2),
round(geometry.lastPoint.Y, 2)])
unique_list = []
for x in startlist:
if x not in lastlist:
unique_list.append(x)
for zz in unique_list:
array = arcpy.Array(arcpy.Point(zz[0], zz[1]))
Multipoint = arcpy.Multipoint(array)
cursor = arcpy.da.InsertCursor(start_of_drainages_fullpath, "SHAPE@")
cursor.insertRow((Multipoint, ))
del cursor
def generateCurves(fc):
desc = arcpy.Describe(fc)
fc_name = desc.name
fc_gdb = desc.path
Curves = fc_gdb + "\\" + fc_name + "_curves_polygon"
if arcpy.Exists(Curves):
arcpy.Delete_management(Curves)
arcpy.CreateFeatureclass_management(fc_gdb, fc_name + "_curves_polygon",
"POLYGON", "", "", "", fc)
for row in arcpy.da.SearchCursor(fc, ['SHAPE@']):
pts = arcpy.Array()
j = json.loads(row[0].JSON)
if 'curve' in str(j):
#print "You have true curves!"
try:
exe = [
pts.add(arcpy.Point(f[0], f[1])) for i in row[0] if i
for f in i if f
]
except:
exe = [pts.add(f) for i in row[0] if i for f in i if f]
if pts:
pts.add(pts.getObject(0))
polygon = arcpy.Polygon(pts,
arcpy.SpatialReference("Israel TM Grid"))
diff = polygon.symmetricDifference(row[0])
diff_sp = arcpy.MultipartToSinglepart_management(
diff, arcpy.Geometry())
if len(diff_sp) > 0:
arcpy.Append_management(diff_sp, Curves, "NO_TEST")
return Curves
def generateCurves(fc):
desc = arcpy.Describe(fc)
fc_name = desc.name
fc_gdb = desc.path
Curves = fc_gdb + "\\" + fc_name + "_curves_polygon"
#print "generateCurves("+fc_name+")..."
arcpy.CreateFeatureclass_management(fc_gdb, fc_name + "_curves_polygon",
"POLYGON", "", "", "", fc)
curveFeatureList = []
for row in arcpy.SearchCursor(fc):
pts = []
geom = row.Shape
j = json.loads(geom.JSON)
if 'curve' in str(j):
#print "You have true curves!"
coords = geom.__geo_interface__['coordinates']
for i in coords:
if i:
for f in i:
if f:
pts.append(arcpy.Point(f[0], f[1]))
if pts:
polygon = PtsToPolygon(pts)
diff = polygon.symmetricDifference(geom)
diff_sp = arcpy.MultipartToSinglepart_management(
diff, arcpy.Geometry())
if len(diff_sp) > 0:
arcpy.Append_management(diff_sp, Curves, "NO_TEST")
return Curves
def __init__(self, center, inputRangeList, distanceUnits, sr):
''' initialize rings '''
self.deleteme = []
# project center to sr, and keep it as a list of PointGeometries object
originalGeom = arcpy.CopyFeatures_management(center, arcpy.Geometry())
newGeom = []
for g in originalGeom:
newGeom.append(g.projectAs(sr))
self.center = newGeom
self.rangeList = self._sortList(inputRangeList)
if distanceUnits == None or distanceUnits == "#" or distanceUnits == "":
self.distanceUnits = sr.linearUnitName
else:
self.distanceUnits = distanceUnits
if not sr == None or not sr == "#" or not sr == "":
self.sr = sr
else:
self.sr = srDefault
self.ringFeatures = None
self.radialFeatures = None
self.ringCount = len(self.rangeList)
self.ringMin = min(self.rangeList)
self.ringMax = max(self.rangeList)
def sobreposicao_poligono_camada(poligono, camada, dissolve=True):
log(id_imovel, 'Classificando tema {0}'.format(camada))
clipped = arcpy.Clip_analysis(camada, poligono, arcpy.Geometry())
if not clipped:
return None
if not dissolve:
return clipped
return dissolve_poligonos(clipped)
def execute(self, parameters, messages):
"""The source code of the tool."""
in_layer = parameters[0].valueAsText
out_layer = parameters[1].valueAsText
geometries_list = arcpy.CopyFeatures_management(in_layer, arcpy.Geometry())
result_geometry = [polygon.extent.polygon for polygon in geometries_list]
return arcpy.SpatialJoin_analysis(result_geometry, in_layer, out_layer)
def buffer_poligno(poligono, distance):
if not poligono:
return None
if distance == 0:
return poligono
buf = arcpy.Buffer_analysis(poligono, arcpy.Geometry(),
buffer_distance_or_field="{0} Meters".format(distance), line_side="FULL", line_end_type="ROUND",
dissolve_option="ALL", dissolve_field="", method="PLANAR")
return buf[0] if len(buf) > 0 else None
def dissolve_poligonos(lista_poligonos):
if not lista_poligonos:
return None
lista = filter(lambda item: item, lista_poligonos)
if len(lista) == 0:
return None
if len(lista) == 1:
return lista[0]
dissolved = arcpy.Dissolve_management(lista, arcpy.Geometry())
return dissolved[0] if len(dissolved) > 0 else None
def Mcp(pointList):
if type(pointList[0]) != arcpyPointType:
pointList = [arcpy.Point(point[0], point[1]) for point in pointList]
#MinimumBoundingGeometry() will not accept a list or an arcpy.Array of geometries,
#only a single geometry works (Polyline or Multipoint is much faster than a Polygon).
points = arcpy.Multipoint(arcpy.Array(pointList))
empty = arcpy.Geometry()
#correct results are dependent on having arcpy.env.outputCoordinateSystem set
mcpList = arcpy.MinimumBoundingGeometry_management(points, empty,
"CONVEX_HULL", "ALL")
return mcpList[0]
def create_aoi_mask_layer(aoi_features, output_feature_class, style_layer=None):
"""Create a visibility mask to focus on an Area of Interest in a map."""
assert has_arcpy, 'ArcPy is required (environment with arcpy referencing ArcGIS Pro functionality) to create an AOI mask.'
# get a describe object to work with
desc = arcpy.Describe(aoi_features)
# ensure aoi is polygon
assert desc.shapeType == 'Polygon', 'The area of interest must be a polygon.'
# if multiple polygons, dissolve into one
if int(arcpy.management.GetCount(aoi_features)[0]) > 1:
aoi_features = arcpy.analysis.PairwiseDissolve(aoi_features, arcpy.Geometry())
# simplify the geometry for rendering efficiency later
tol_val = (desc.extent.width + desc.extent.height) / 2 * 0.0001
smpl_feat = arcpy.cartography.SimplifyPolygon(aoi_features, out_feature_class=arcpy.Geometry(),
algorithm='POINT_REMOVE', tolerance=tol_val,
collapsed_point_option='NO_KEEP').split(';')[0]
# create polygon covering the entire globe to cut out from
coord_lst = [[-180.0, -90.0], [-180.0, 90.0], [180.0, 90.0], [180.0, -90.0], [-180.0, -90.0]]
coord_arr = arcpy.Array((arcpy.Point(x, y) for x, y in coord_lst))
mask_geom = [arcpy.Polygon(coord_arr, arcpy.SpatialReference(4326))]
# erase the simplified area of interest from the global extent polygon
mask_fc = arcpy.analysis.Erase(mask_geom, smpl_feat, output_feature_class)
# get the style layer if one is not provided
styl_lyr = Paths.dir_arcgis_lyrs / 'aoi_mask.lyrx' if style_layer is None else style_layer
# create a layer and make it pretty
strt_lyr = arcpy.management.MakeFeatureLayer(mask_fc)[0]
styl_lyr = str(styl_lyr) if isinstance(styl_lyr, Path) else styl_lyr
lyr = arcpy.management.ApplySymbologyFromLayer(strt_lyr, styl_lyr)[0]
return lyr
def execute(self, parameters, messages):
"""The source code of the tool."""
in_layer = parameters[0].valueAsText
out_layer = parameters[1].valueAsText
tolerance = float(parameters[2].valueAsText)
# Using the "arcpy.Geometry" object's generalize method,
# which simplify the geometry by a distance tolerance between vertices
in_geometries = arcpy.CopyFeatures_management(in_layer,
arcpy.Geometry())
result_geometry = [
feature.generalize(tolerance) for feature in in_geometries
]
return arcpy.CopyFeatures_management(result_geometry, out_layer)
def execute(self, parameters, messages):
"""The source code of the tool."""
in_layer = parameters[0].valueAsText
symmetric_layer = parameters[1].valueAsText
output_layer = parameters[2].valueAsText
# Dissolve input and symmetric layers to two single polygons, to
# avoid collisions between input polygons' symmetric differences
in_geometry = arcpy.Dissolve_management(in_layer, arcpy.Geometry())[0]
symmetric_difference_geometry = arcpy.Dissolve_management(
symmetric_layer, arcpy.Geometry())[0]
# Perform symmetric difference between the two above geometries
symmetric_difference_geometry = [
in_geometry.symmetricDifference(symmetric_difference_geometry)
]
# Break apart the symmetric difference to separated polygons
symmetric_difference_geometry = arcpy.Dissolve_management(
symmetric_difference_geometry,
arcpy.Geometry(),
multi_part="SINGLE_PART")
# Retrieve the polygons data from input layer
return arcpy.SpatialJoin_analysis(symmetric_difference_geometry,
in_layer, output_layer)
def findbiggestgeometry(houses_around): find_flag = 0 max_square = 0 max_geometry = arcpy.Geometry() for geometry in houses_around: square = geometry.area if square >= max_square: max_square = square max_geometry = geometry find_flag = 1 return max_geometry, find_flag
def checkGeometry(polygon, point, tableField="Name"):
""" polygon has to be either a layer object or a shp file / gdb feature file without a Raster-field.
point has to be a either a layer object or a shp/gdb feature file. NOTE: Only the last row will be taken into consideration.
Returns: A str-list of polygons which contain the point.
"""
try:
#result=[]
string = ""
print type(string)
polygonGeometries = arcpy.CopyFeatures_management(
polygon, arcpy.Geometry())
try:
pointGeometry = arcpy.CopyFeatures_management(
point, arcpy.Geometry())[-1]
except:
arcpy.AddWarning("Die Point-Datei ist leer!")
print("Die Point-Datei ist leer!")
polygonNames = [
row[0] for row in arcpy.da.SearchCursor(polygon, (tableField))
]
for index, polygonGeometry in enumerate(polygonGeometries):
if polygonGeometry.contains(pointGeometry):
print "Die Geometrie enthaelt:" + polygonNames[index]
#result.append(polygonNames[index])
string += polygonNames[index] + "\n"
return string
except:
arcpy.AddMessage(
"Fehler in Funktion checkGeometry (checkGeometry -> point2map-library)."
)
print(
"Fehler in Funktion checkGeometry (checkGeometry -> point2map-library)."
)
string = "Kartengrundlage: Keine Karte gefunden!"
return string
def changeStartingVertex(fcInputPoints, fcInputPolygons):
## Create Geometry Object for Processing input points.
g = arcpy.Geometry()
geomPoints = arcpy.CopyFeatures_management(fcInputPoints, g)
listPointCoords = []
for point in geomPoints:
listPointCoords.append([point.centroid.X, point.centroid.Y])
#arcpy.AddMessage(str(point.centroid.X) + ","+ str(point.centroid.Y))
with arcpy.da.UpdateCursor(fcInputPolygons,
["OID@", "SHAPE@"]) as ucPolygons:
for featPolygon in ucPolygons:
vertexList = []
#arcpy.AddMessage("Feature: " + str(featPolygon[0]))
i = 0
iStart = 0
for polygonVertex in featPolygon[1].getPart(0): # shape,firstpart
if polygonVertex:
#arcpy.AddMessage(' Vertex:' + str(i))
vertexList.append([polygonVertex.X, polygonVertex.Y])
if [polygonVertex.X, polygonVertex.Y] in listPointCoords:
#arcpy.AddMessage(" Point-Vertex Match!")
iStart = i
else:
pass
#arcpy.AddMessage(" No Match")
i = i + 1
if iStart == 0:
newVertexList = vertexList
#arcpy.AddMessage("No Change for: " + str(featPolygon[0]))
else:
#arcpy.AddMessage("Changing Vertex List for: " + str(featPolygon[0]))
newVertexList = vertexList[iStart:i] + vertexList[0:iStart]
for v in newVertexList:
arcpy.AddMessage(str(v[0]) + "," + str(v[1]))
#listVertexPointObjects = []
newShapeArray = arcpy.Array()
for newVertex in newVertexList:
#arcpy.AddMessage("Changing Vertex: " + str(newVertex[0]) + ',' + str(newVertex[1]))
newShapeArray.add(arcpy.Point(newVertex[0], newVertex[1]))
#listVertexPointObjects.append(arcpy.Point(newVertex[0],newVertex[1]))
#newShapeArray = arcpy.Array(listVertexPointObjects)
newPolygonArray = arcpy.Polygon(newShapeArray)
ucPolygons.updateRow([featPolygon[0], newPolygonArray])
return
def SetupRaster(features, smoothingFactor, sr=None, cellSize=None):
#Describe() will get the envelope in the feature's Spatial Reference
#extent = arcpy.Describe(features).extent
#This will return the extent in the environment's Output Spatial Reference
mcpList = arcpy.MinimumBoundingGeometry_management(features,
arcpy.Geometry(),
"ENVELOPE", "ALL")
extent = mcpList[0].extent
if utils.IsFloat(cellSize):
cellSize = float(cellSize) # all parameters from ArcToolbox are text
else:
cellSize = DefaultCellSize(extent)
# FIXME explain why r=2*h
searchRadius = 2 * smoothingFactor
return extent, cellSize, searchRadius
def find_nearest_distance(self, row, col, layer):
point = self.get_geo_point_from_raster(row, col)
if layer not in self.feature_class_dict:
# so the whole layer does not have to be loaded at a time
self.feature_class_dict[layer] = arcpy.CopyFeatures_management(
layer, arcpy.Geometry())
geometries = self.feature_class_dict[layer]
closeted = None
for geometry in geometries:
possible_closest = geometry.distanceTo(point)
if closeted is None:
closeted = possible_closest
elif possible_closest < closeted:
closeted = possible_closest
return closeted
def execute(self, parameters, messages):
"""The source code of the tool."""
in_layer = parameters[0].valueAsText
out_layer = parameters[1].valueAsText
tolerance = float(parameters[2].valueAsText)
in_geometries = arcpy.CopyFeatures_management(in_layer,
arcpy.Geometry())
out_geometries = []
for polygon in in_geometries:
# Get all features in tolerance distance from current iterated polygon
polygons_in_range = [
feature for feature in in_geometries
if polygon.distanceTo(feature) <= tolerance
]
# Union said features with a dissolve, in case that the features does not overlap
union_polygon = arcpy.Dissolve_management(polygons_in_range,
arcpy.Geometry())
# Convex hull aggregates the features together
convex_polygon = union_polygon[0].convexHull()
out_geometries.append(convex_polygon)
arcpy.Dissolve_management(out_geometries,
out_layer,
multi_part="SINGLE_PART")
def createCropBoxTopo(infeature, orderNumber, scale=24000):
"""creates a polygon based off of the order layer with presets for topo. scale is parameter to make it more usable for other shit."""
# grab the centroid from the order table
# note that this is flawed because we can have orders that have many rows
# makes me think that we should do a dissolve on order number or something
centroid = arcpy.Select_analysis(
infeature, arcpy.Geometry(),
""" "Orders"= '{}' """.format(orderNumber))[0].centroid
# flip the f*****g point because of f*****g arc
centroid = (centroid.Y, centroid.X)
# create a MapDocument class
mapDoc = MapDocument(scale=scale, centroid=centroid)
# which allows us to create a polygon
poly = mapDoc.createArcPolygon()
return poly
def createGeometry(pntCoords, geometry_type):
geometry = arcpy.Geometry()
spatialRef = arcpy.SpatialReference(4326)
if geometry_type.lower() == 'point':
geometry = arcpy.Multipoint(
arcpy.Array([arcpy.Point(*coords) for coords in pntCoords]),
spatialRef)
elif geometry_type.lower() == 'polyline':
geometry = arcpy.Polyline(
arcpy.Array([arcpy.Point(*coords) for coords in pntCoords]),
spatialRef)
elif geometry_type.lower() == 'polygon':
geometry = arcpy.Polygon(
arcpy.Array([arcpy.Point(*coords) for coords in pntCoords]),
spatialRef)
return geometry
def execute(self, parameters, messages):
"""The source code of the tool."""
in_layer = parameters[0].valueAsText
out_layer = parameters[1].valueAsText
geometries_list = arcpy.CopyFeatures_management(
in_layer, arcpy.Geometry())
points = []
for geometry in geometries_list:
parts = geometry.getPart()
for part in parts:
points += [
arcpy.PointGeometry(part.getObject(i))
for i in range(len(part))
]
return arcpy.SpatialJoin_analysis(points, in_layer, out_layer)
def sobreposicao_camadas(camada1, camada2, dissolve=True, keep_atributes=False):
log(id_imovel, 'Classificando tema {0}'.format(camada2))
if (not arcpy.Exists(camada2)):
log(id_imovel, 'Tema {} nao encontrado na base de insumos'.format(camada2))
return None
if keep_atributes:
join_attributes = 'NO_FID'
output = arcpy.CreateUniqueName('INTERSECT', '%scratchGDB%')
else:
join_attributes = 'ONLY_FID'
output = arcpy.Geometry()
intersect = arcpy.Intersect_analysis([camada1, camada2], output, output_type='INPUT', join_attributes=join_attributes)
if not intersect:
return None
if not dissolve:
return intersect
return dissolve_poligonos(intersect)
def addAreaPerimeter(dbfPath, areaName, perimeterName):
# This function adds fields to the specified dbf and calculates area and
# perimeter for each row based on the shapfile accompanying the dbf
# first make sure we have the fields we want
try:
arcpy.DeleteField_management(dbfPath, areaName)
arcpy.DeleteField_management(dbfPath, perimeterName)
except:
print "one or more fields not found. Creating..."
try:
arcpy.AddField_management(dbfPath, areaName, "FLOAT", 6)
arcpy.AddField_management(dbfPath, perimeterName, "FLOAT", 6)
except:
print "WARNING! was not able to add pp_area or pp_perimeter fields"
# this is the geometries from the .shp that comes with the dbf
geometries = arcpy.CopyFeatures_management(dbfPath[0:-3] + "shp",
arcpy.Geometry())
# setup lists
areas = []
perimeters = []
# fill lists with data from geometries
for geometry in geometries:
areas.append(geometry.getArea("GEODESIC"))
perimeters.append(geometry.getLength("GEODESIC"))
print "Area:", geometry.getArea(
"GEODESIC"), "Length:", geometry.getLength("GEODESIC")
# put the data from the geometries into the dbf in the new fields we just made
i = 0
updateCursor = arcpy.da.UpdateCursor(dbfPath, (areaName, perimeterName))
for row in updateCursor:
row[0] = areas[i]
row[1] = perimeters[i]
updateCursor.updateRow(row)
i += 1
# clear references
del row
del updateCursor
del geometries
def line_extend_within_polygon(boundary_polygon, lines_to_extend):
"""
This python function can extend the lines within a boundary polygon upto the border line.
Here, boundary_polygon is the polygon shapefile and the lines_to_extend is the line shapefile which will be extended upto the border using the function.
"""
arcpy.PolygonToLine_management(in_features=boundary_polygon,
out_feature_class="boundary_line",
neighbor_option="IDENTIFY_NEIGHBORS")
arcpy.RepairGeometry_management(in_features=lines_to_extend,
delete_null="DELETE_NULL")
coastline = "boundary_line"
directions = lines_to_extend
g = arcpy.Geometry()
bank = arcpy.CopyFeatures_management(coastline, g)[0]
for i in range(2):
with arcpy.da.UpdateCursor(directions, "Shape@") as cursor:
for row in cursor:
line = row[0]
pStart = line.firstPoint
pEnd = line.lastPoint
L = line.length
dX = (pEnd.X - pStart.X) / L
dY = (pEnd.Y - pStart.Y) / L
p = pEnd
m = 0
while True:
l = bank.distanceTo(p)
L += l
p.X = pStart.X + dX * L
p.Y = pStart.Y + dY * L
m += 1
if m > 100: break
if l < 0.001: break
if m > 100: continue
row[0] = arcpy.Polyline(arcpy.Array([pStart, p]))
cursor.updateRow(row)
if i == 0:
arcpy.FlipLine_edit(in_features=directions)
# deleting the boundary_line layer
arcpy.Delete_management(coastline)
return
